Mysterious rocks that ring musically when struck.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Three legendary, living albino buffalo roaming their pastures for all to see.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

Rock-cut cave complex filled with ancient Buddhist artwork.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

An abandoned castle owned and ignored by Masons carries a cursed history.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Hoax, mistake, or evidence of dinosaurs in human times?

A battle between nature and architecture in the Cambodian jungle.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Death rituals and sacrifice inside a Peruvian megalith.

Ancient rock-hewn town that witnessed key events of Georgian history.

Nazca pilgrimage site covering 370 acres is a popular stop for archeologists and looters.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

What happens when you cross a mayor and a painter?

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

An abandoned Gold Coast-era mansion once intended for the exiled ruler of Albania, who never arrived.

The Avenue of Mausolea is a series of grand palatial tombs.

This iconic fortress was once the crown jewel of Haiti's national defense.